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Fluid activities porous media

One of the important transformation processes in the porous media is the deposition of solid material in pores and the subsequent clogging of the fluid flow through the porous medium. Typical examples are filtration and clogging of well walls in oil fields due to the particles present in the injected fluid. Another example is the deposition of clusters of active catalyst species in porous supports. [Pg.169]

Porous medium is multiphase with two fluid phases water and oil. Water transports dissolved species (cations and anions) present in seawater (injected water) and formation (connate) water. The geochemical model proposed by Yuan and Todd (1991) was adopted to model the mixture of high saline water types. This model gives the activity coefficients for the Na-Ca-Ba-Sr-Mg-S04-Cl system extrapolated to typical reservoir... [Pg.601]

In conventional oil recovery activities via waterflooding, low yields are normally observed, basically as a result of high oil viscosity and high interfacial tensions developed when water is injected. When the viscosity of the injected fluid is lower than that of the fluid to be displaced, the previous one flows more swiftly than the latter across the porous medium, often finding preferred paths. In view of high-interfacial tensions, the capacity of the injected fluid to displace the oil is rather impaired, resulting in high contents of residual oil in the wells. [Pg.435]


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See also in sourсe #XX -- [ Pg.515 ]




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